during a single axis move, why do my other axes offset their position?

[Rick_L]

When I move any one of the axes on my PCI-7344 card I get a positional offset on the other three. when I stop the move, the other three axes return to their approximate starting position after a couple of seconds. I am measuring this offset with an electronic indicator. This error occurs in MAX and in Labview. I have isolated the motor cables and verified shield and ground connections. Do you have any other suggestions on what to look for?

[Evan]

Rick,
You may be better off posting this question in the motion specific forum. This forum is LabVIEW specific so you may be missing some great motion experts who only read the motion posts.

[Rick_L]

Thank you Evan, I already solved this problem. My analog ground had actually been tied to the digital ground through the Trust servo amps. Once I isolated these two grounds the symtoms disapeared.